Ventilator.



J. CIIAFEH.`

VENTILTOR. APPLICATION man `nc. 3o. m5.

Patented Nov. 2i?, 1917,

w d w ww @j W, m afm ff lUlN MFE@ @TATFS PATENT @FFllQM JOHN CHAFER, OF CLEVELAND, OHIO.

VENTILATOR.

Application led. December 30, 1915.

To all wwm t may concern.'

Be it known that I, JOHN CHAFER, a citizen of the United States of America, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Ventilators; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to new and useful improvements in revolving chimney cowls or ventilators.

The object of the invention is to provide an improved ventilator for use on chimneys or stacks of buildings and the like which will afford a thorough Ventilating means and will at the same time prevent rain or moisture from entering the chimney or stack.

My invention, therefore, consists in the features of construction and combination of parts, hereinafter described in the specification, particularly pointed out in the claims and illustrated in their preferred form in the accompanying drawings.

Referring to the accompanying drawings, Figure 1 is a top plan view of a ventilator embodying my invention. Fig. 2 is a side elevation of the same showing also a portion of the stack on which the ventilator is mounted. Fig. 3 is a section on line 33, Fig. 2. Fig. 4 is a section on line 4 4, Fig. 2.

The ventilator comprises a hollow oblong casing 10 which is entirely open at each end and is in general rectangular in cross section. The casing is slightly larger at one end, which may be termed the air inlet end, than it is at the opposite end, which may be termed the outlet end. On the bottom of the casing and approximately central thereof is rigidly mounted a sleeve 11 which is adapted to t down over the upper end of the stack or chimney, shown at A, so that the sleeve may turn freely thereon. Near the upper end of the stack is secured a support in the form of a spider l2 in which is rigidly mounted a vertical shaft or spindle 13. The upper end of the spindle is preferably pointed and on the bottom of the ventilator casing is secured a socket 14 adapted to receive the end of the spindle and form a bearing for the casing. A bearing 15 for the spindle is secured near the top of the stack and another bearing 16 is arranged on the spindle Specification of Letters Patent.

Patented Nov.a 2*?, 191% Serial No. 69,328.

within the sleeve. The ventilator casing is therefore mounted so as to rotate freely on the stack and change its position according as the direction of the wind changes. On top of the ventilator casing is mounted a vane 17 in the usual manner.

In the bottom of the ventilator casing at each side thereof and near the center is formed an oblong or elliptical shaped opening 20, but otherwise the bottom of the ventilator is imperforate. At diametrically opposite sides of the sleeve l1 and in vertical alinement with the openings 20 in the bottom of the casing are formed openings 2l. Curved pipes 22 extend from the openings in the sleeve to the openings 'in the bottom of the casing. lNithin the casing are arranged two partition walls 23. Each wall starts at one side edge of the casing at the inlet or mouth of the casing and then curves for a short distance and then extends approximately parallel with the sides of the casing to a point slightly beyond the openings 20. The said partitions therefore form a central funnel shaped chamber 24 and two side chambers 25 which include the openings 20. The central chamber is the inlet chamber; the side chambers 25 are the vacuum chambers, and the common chamber 26 at the outlet end is the suction chamber. Brace Walls 27 are preferably arranged between the side walls of the casing and the partition walls 23 which serve to strengthen the partition walls and also reduce the size of the suction chambers.

The operation of my improved ventilator is as follows :-The wind or air enters the ventilator casing at the mouth of the funnel shaped inlet chamber and passes through said chamber into the suction chamber and then out at the outlet end of the casing. As the wind leaves the inlet chamber and passes into the suction chamber the air is sucked out of the side chambers 25 creating a vacuum therein, and the air from the interior of the building is drawn up through side Walls of the casing and being spaced from the side Walls at the outlet end of the casing, said partition walls dividing the interior of the casing into an inlet chamber, a vacuum chamber arranged at each side of the inlet chamber and a suction chamber arranged at the outlet end ol the casing and communicating with the inlet chamber and thevacuuni chambers, each vacuum chamber having an opening in the bottoni Wall tl1ere of, a sleeve mounted on the. bottom of the casing, said sleeve having openings at diametrically opposite sides thereof and pipes connecting' the openings in the vacuum chambers with the openings in said sleeves. 2. The combination With a stack, of a ventilator casing rectangular' in cross-section and having an inlet opening at one end and an outlet opening at the other end, the outlet opening being smaller than the inlet opening, a sleeve arranged on the bottom of the casing and adapted to receive the upper end of the stack7 said sleeve having openings at diametrically opposite sides, means arranged in the stack for rotatably supporting said casing, said casing being provided with openings in the bottom thereof near each side, lpipes extending from said openings in the bottoni of the casing to the openings in the sleeve and partition Walls arranged Within the casing and extending from top to bottom thereof, said partition Walls dividing the interior of the casingy into a funnel-shaped. central chamber which eX- tends from the inlet end of the casing to a point beyond the center of the casing, two side chambers, said side chambers being arranged to include the openings in the bottoin of the casing and a chainberfat the outlet end of the casing in open communication with the central chamber and the tW/O Side chambers.y

ln testimony whereof, I signthe foregoing speciication7 in the presence of two Witnesses.

JOHN CHAFER.

Witnesses Y VICTOR v C. LYNCH, B. C. BROWN.

Copies o1 this patent may be obtained for ve cents each, by addressing the Commissioner aflatoxin, Washington, D. G. 

